SR55 Ultrasonic Sensor Technical Guide for Industrial Automation
Executive Summary
In the intricate fabric of modern industrial automation, the demand for non-contact sensing technology has transitioned from a luxury to a fundamental operational requirement. As industries ranging from wastewater management to automated logistics strive for higher efficiency and lower maintenance overheads, the limitations of mechanical float switches and the cost-prohibitive nature of radar systems have created a distinct void. This void is effectively filled by high-performance ultrasonic sensors.
This technical guide explores the SR55 Ultrasonic Sensor (Model: UM4000-SR55-AU), a solution from Yujie Piezo Technology. It explains the sensor's engineering, acoustic physics, materials, and signal processing choices that define its performance. By examining its 75 kHz operating frequency, PBT housing construction, and 4-meter detection range, the guide helps engineers, system integrators, and procurement specialists evaluate whether the SR55 fits their application.
We will explore the underlying piezoelectric phenomena that power the device, the thermodynamic principles governing its temperature compensation, and the real-world application dynamics that dictate its installation. This is not merely a product overview; it is a deep dive into the science of sensing.
Engineering decision notes
Ultrasonic sensing and detection
Use this article when sensor performance depends on target distance, beam angle, housing material, liquid behavior, or false echo control. For "SR55 Ultrasonic Sensor Technical Guide for Industrial Automation", the practical value is in turning the topic into a measurable selection or sourcing decision.
Yujie treats ultrasonic sensing as an acoustic interface problem: transducer frequency, beam shape, housing, drive electronics, and target environment are reviewed together.
Selection checks
- Define target range, dead zone, beam angle, and mounting geometry before choosing the sensor family.
- Check the medium, target surface, temperature swing, foam, vapor, and side-wall risk.
- Separate detection repeatability from ideal lab accuracy when the sensor will operate in a tank, tube, or moving line.
Failure risks
- A sensor can pass bench distance tests and still fail in tanks with foam, agitation, vapor, or narrow geometry.
- Changing only frequency without reviewing beam angle and mounting can increase false echoes.
- Ignoring housing material or sealing requirements can shorten lifetime in washdown or chemical environments.
RFQ details
- What is the minimum and maximum detection distance?
- Is the target liquid, solid, sheet material, air flow, or a moving object?
- What temperature, humidity, IP rating, and output signal does the system require?
Relevant Yujie pages
- Ultrasonic Sensors
Distance, level, and detection sensor portfolio
- Flow Measurement Transducers
Bubble and flow-related ultrasonic sensing paths
- Air Acoustic Transducers
Air-coupled transducers for range and presence detection
Application FAQ
- What makes an ultrasonic sensor page useful for procurement?
- It should connect range, beam angle, output signal, housing, mounting, and environmental limits to a concrete use case. A model name alone is not enough for reliable supplier comparison.
- Which information speeds up an ultrasonic sensor RFQ?
- Send the target material, distance range, installation geometry, output interface, temperature range, IP rating, and whether the application involves foam, vapor, liquid, or moving objects.